An antique cabinet is being sold by means of an English auction. There are four bidders, Gloria, Elise, Judy, and Arabella. These bidders are unacquainted with each other and do not collude. Gloria values the cabinet at $800, Elise values it at $500, Judy values it at $1,800, and Arabella values it at $600. If the bidders bid in their rational self-interest, the cabinet will be sold to ______ at price ______.